UM10430 Datasheet, PDF (74/1164 Pages) NXP Semiconductors – LPC18xx ARM Cortex-M3 microcontroller

UM10430 NXP
Semiconductors
Table
Bit
8:0
22:9
23
49.
FREQ_MON register
Symbol
RCNT
FCNT
MEAS
Value
(FD_9M1R_-4eeb-Es_aibtcQsirt^C_rue_i_sr^h_pfM_eeet^a_lriOefoe^p_rceN_nn^t_tq^e_ce, _ued^ra_ed_c⁹_cnld_l^:_oocr_c^L_yce_kk^Ps_--cs_c^C_oo0¹_uux⁸_nn4_t^x_tee0^x_rr0^D_v5_v^RC_aa^A0^l_ll^oF_uu0^T_ee^c1^Dk4^R)^GADb^FReit^TAnd^DFee^TR_00Rv0^rs^ADa_ace^FRt_l^Trsu^iADi^o_ep^D_e^FR_t^nTRt^Ai_Ao^FDUTFRn_{TnADRRARDiFR/c/}^tTR_WW^DA_c^(ARFDC_e^TFAR_sTGFADs^{TDFRUTRDA)ARDFTFDARTRFADTADFRTFRDATADRF}
0
RCNT and FCNT disabled
1
Frequency counters started
28:24 CLK_SEL
Clock-source selection for the clock to be 0
R/W
measured. All other values are reserved.
0x00
32 kHz oscillator (default)
0x01
IRC
0x02
ENET_RX_CLK
0x03
ENET_TX_CLK
0x04
GP_CLKIN
0x05
Reserved
0x06
Crystal oscillator
0x07
PLL0 (USB)
0x08
PLL0 (audio)
0x09
PLL1
0x0A Reserved
0x0B Reserved
0x0C IDIVA
0x0D IDIVB
0x0E IDIVC
0x0F
IDIVD
0x10
IDIVE
31:29 -
Reserved
-
-
9.6.2 Crystal oscillator control register
The register XTAL_OSC_CONTROL contains the control bits for the crystal oscillator.
Table 50. XTAL_OSC_CTRL register (XTAL_OSC_CTRL, address 0x4005 0018) bit
description
Bit
Symbol Value Description
Reset Access
value
0
ENABLE
Oscillator-pad enable. Do not change the BYPASS 1
R/W
and ENABLE bits in one write-action: this will result
in unstable device operation!
0
Enable
1
Power-down (default)
<Document ID>
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 00.13 — 20 July 2011
© NXP B.V. 2011. All rights reserved.
74 of 1164